Chair with automatically-changing seat.



Patented Nov. [4, I899.

F. BEIL.

CHAIRWITH AUTOMATICALLY CHANGING SEAT.

(Application filed June 27, 1899.)

(No Model.)

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A 770mm Y5 rTE STATES FRANZ BEIL, OF WARNSDORF, AUSTRIA-HUNGARY.

CHAIR WITH AUTOMATICALLY-CHANGING SEAT.

SPECIFICATION forming part of Letters Patent No. 636,745, dated November14:, 1899.

Application filed June 27, 1899 Serial No. 722,068. (No model.)

To aZZ whom it may concern.-

Be it known that I, FRANZ BEIL, residing at Warnsdorf, Bohemia,Austria-Hungary, have invented an Improvement in Chairs withAutomatically-Changing Seats, of which the following is a specification.

This invention relates to a chair with an' automatically-changingseating-surface and is distinguished by an endless band which is set inmotion by means of a transporting apparatus actuated by the weight ofthe sitter extending two spiral springs in such a manner that when thechair is vacated by the person who has been seated thereon theseating-surface will be automatically changed.

The chairs hitherto used and provided with but a single seating-surfacehave a great drawback frequently noticeable not only from an estheticbut also from a hygienic point of View, as they attract heat, &c. fromthe body, which is unpleasant to the person who next makes use of thechair. This drawback is particularly noticeable in public places wherethe seats are used by different persons in quick succession-forinstance, in hair-dressers shops, banks, and the like.

The object of this invention is to remedy this evil, which is done inthe simplest and most practical manner, as even when the chair isconstantly in use by a number of persons in succession theseating-surface previously used can become completely cool before it isin position for use again, and that on which the following person sitsis perfectly fresh.

The invention is illustrated in the accompanying drawings, in which-Figure 1 is a central vertical section of the chair, and Fig. 2 is adetail.

The chair a, which may be furnished with a back or otherwise, stands onfour legs I), made of bent wood or bent iron, the inner surfaces ofwhich serve as running-surfaces for friction-rollers c. A frame d,jammed in between the legs, acts as a bearing for these rollers and fora larger roller or cylinder 6 f g h. The last named is loosely seated ona shaft 1' and serves as a transporting-cylinder.

For this purpose it is furnished with teeth or pins which engage in anendless band 70, that serves as the seating-surface and impels it at theproper moment. A pawl arrangement suitably arranged restricts thetransportingcylinder h, and thereby the seating-surface also, to aunilateral motion. The frame d is furnished on the sides with two slots1, in which two cross-stays m, firmly attached to the chair-f ram e, canbe guided. These crossstays m are in their turn connected together bymeans of two rods 11., to each of which a spiral spring p is attached,their other ends being connected by means of a cross-bar 0 with themovable frame (1.

The action of the chair is as follows: As soon as a person sits on theseating-surface the latter runs down to a certain extent as far as thecross-stays m. As the seating-sun face and the transporting apparatusare connected together by means of the frame (1, it is obvious that thewhole mechanism descends at the same time, whereby the springs 9, whichare firmly connected with the crossrods, are put under tension. Pawls q,arranged on the side surfaces of the transporting-cylinder h, prevent atthe same time any rotation of the cylinder. If now the person who isseated vacates the chair, the seatingsurface and the movable frame darereturned to their former positions by the power of the springs undertension, a tooth-wheel 8, carried by the movable frame, gearing with arack r, fixed to the chair-frame, and thus setting thetransporting-cylinder h in rotation through the medium of a gearingarrangement, the transporting-cylinder in turn engaging with its teethor pins in the endless band To, that formsthe seating-surface, andimpelling it farther to the extent of one seating-surface.

Having now.particularly described and ascertained the nature of the saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is- 1. In combination with the supportingframe, the seatcomprising an endless band and means for causing said band to travel,said means being placed in operating condition when a person is seatedand operating when relieved of the Weight of the person, substantiallyas described.

2. In combination with the supportingframe, the seat comprising anendless band and means for causing said band to travel comprising thespring placed under tension by the Weight of the person and driving con-I ncction between the spring and band, said Y [L. s] RICHARD HIRT.

